1. Reason:
Through experiments, it is believed that there are only three main reasons for poor initial waterproof performance:
First, processed cloth; scouring or dyeing cloth is not cleaned enough, and scouring agent, leveling agent, dispersant, penetrating agent and other additives remain on the cloth.
Second, the problem of working fluid is that the concentration is improperly used or the concentration changes during processing; or, the working fluid is affected by mechanical stirring, temperature, mixing chemicals, etc., and its stability is affected. Then there is the improper preparation sequence of working fluid.
Third, due to processing conditions, improper selection, or insufficient and uneven drying and baking conditions. The main countermeasures to solve the above problems can start from the following aspects.
2. Main countermeasures
a. Before waterproof processing, the processed cloth should be fully washed.
b. Choose one suitable for processing fibers, and replenish newly prepared working fluid as much as possible during processing. Strengthen the temperature management of the processed cloth to prevent the hot cloth from entering the studio directly after drying. Understand the compatibility of the blended chemicals and prepare the working fluid according to the mixing sequence. When other additives are diluted with warm water, they need to be cooled before adding the AG series. The prepared working fluid must be used within 24 hours.
c. The drying and baking temperatures should be uniform, and the baking temperature should not be too low, generally above 140°C.
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